Master controller for robotic arm



FIG. 1 is a perspective view of a master controller in accordance with the present invention;

FIG. 2 is a first side elevational view thereof;

FIG. 3 is a second side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof, showing a front grip in a first position in solid lines and a second position in phantom lines;

FIG. 6 is a front elevational view thereof, showing the grip first position in solid lines and the second position in dashed lines; and,

FIG. 7 is a rear elevational view thereof, showing the grip first position in solid lines and the second position in dashed lines. 

The ornamental design for a master controller for robotic arm, as shown and described. 